/*
 * Copyright 2025, AutoMQ HK Limited.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package kafka.automq.partition.snapshot;

import java.util.Objects;

public class PartitionSnapshotVersion {
    // increment every time when there is a segment change
    private int segmentsVersion;
    // increment every time when there is a new record
    private int recordsVersion;

    private PartitionSnapshotVersion(int segmentsVersion, int recordsVersion) {
        this.segmentsVersion = segmentsVersion;
        this.recordsVersion = recordsVersion;
    }

    public static PartitionSnapshotVersion create() {
        return new PartitionSnapshotVersion(0, 0);
    }

    public int segmentsVersion() {
        return segmentsVersion;
    }

    public int recordsVersion() {
        return recordsVersion;
    }

    public PartitionSnapshotVersion incrementSegmentsVersion() {
        segmentsVersion++;
        return this;
    }

    public PartitionSnapshotVersion incrementRecordsVersion() {
        recordsVersion++;
        return this;
    }

    @Override
    public boolean equals(Object o) {
        if (o == null || getClass() != o.getClass())
            return false;
        PartitionSnapshotVersion version = (PartitionSnapshotVersion) o;
        return segmentsVersion == version.segmentsVersion && recordsVersion == version.recordsVersion;
    }

    @Override
    public int hashCode() {
        return Objects.hash(segmentsVersion, recordsVersion);
    }

    public PartitionSnapshotVersion copy() {
        return new PartitionSnapshotVersion(segmentsVersion, recordsVersion);
    }

}
